Drive 2 is already done. You can check our progress in here:
http://www.rieselprime.org/ (Go to NPLB/Drives)
Drive 1 will probably end Jan or Fev 09. Drive 1 has 6x more work than Drive 3, very difficult to be accurate on the estimate. For now almost cores are on Drive 3 so if they were put in Drive 1 it would be completed in 95 days.
Here's the map we are trying to fill. From 300<k<1000 up to n=1M.
I suppose 15 days left to finish Drive 3.